Mesoporous silica material MCM-41: Novel additive for warm mix asphalts

Woszuk, Agnieszka; Panek, Rafał; Madej, Jarosław; Zofka, Adam; Franus, Wojciech

doi:10.1016/j.conbuildmat.2018.06.177

Cited by 38 publications

(21 citation statements)

References 26 publications

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“…Even so, porous materials can be used in WMA technology. There is a known way to improve the effect of asphalt foam by adding materials soaked with water [ 19 , 35 ]. One should assume that the NaX zeolite, due to its textural properties, adsorbs a large amount of water.…”

Section: Resultsmentioning

confidence: 99%

“…That are the temperature characteristics for a typical HMA process. Such testing conditions have so far been used in the evaluation of WMA viscosity with the addition of zeolites and mesoporous siliceous materials [ 3 , 35 ]. Considering the actual WMA production conditions, further tests are needed for asphalt viscosities with zeolites at lower temperatures.…”

Section: Methodsmentioning

confidence: 99%

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Application of Fly Ash Derived Zeolites in Warm-Mix Asphalt Technology

Woszuk

2018

Materials

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In recent years, numerous studies have been carried out on new technologies allowing to reduce of mix asphalt production temperatures. One of the possibilities is to foam the asphalt with “water-containing” additives, which include zeolites. So far, mainly synthetic zeolites of the Linde A structure type, obtained from chemical reagents, and natural clinoptilolite have been used in WMA technology. In this studies, the synthetic zeolites produced from fly ashes with 4 different types of crystalline structure were analyzed. Zeolite materials were characterized by textural parameters and thermal analysis. The amount of zeolite added to asphalt was 0, 3, 5, 7 wt % in relation to the weight of asphalt. Determination of dynamic viscosity was performed at two temperatures: 135 and 160 and 4 time intervals. The tests were performed for two asphalt binders: 35/50 and 100/150 penetration grade. As a conclusion, it was found that the viscosity of asphalt pastes with zeolitic materials increases with the increase in the amount of zeolite added. The increase level depends mainly on the textural parameters. The potential usefulness of fly ash derived zeolites in the process of asphalt foaming, which depends mainly on the amount of water contained in the zeolite structure and the method of its release, has been proved.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Application of Fly Ash Derived Zeolites in Warm-Mix Asphalt Technology

Woszuk

2018

Materials

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“…The basic research method confirming the structure of materials obtained by synthesis was X-ray diffraction (XRD). The presence of individual crystalline phases for zeolites and mesoporous silica material was recognized on the basis of characteristic inter-plane distances [22,23]. Surface modification with HDTMA does not change the crystalline structure of materials [21].…”

Section: Zeolites and Silica Materialsmentioning

confidence: 99%

The Effects of Textural Parameters of Zeolite and Silica Materials on the Protective and Functional Properties of Polymeric Nonwoven Composites

et al. 2019

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Zeolites are micro- and mesoporous aluminosilicate minerals (both natural and industrially produced) widely used as catalysts and sorbents in domestic and commercial water purification and separation technologies. Their ability to selectively adsorb gases (i.e., water vapor, carbon dioxide, and sulfur dioxide removal) from an air stream makes them suitable for applications in odor reducing media used in filtering facepiece respirators (FFRs). FFRs are multilayer products in which the most important role is played by high-performance melt-blown electret nonwovens modified with activated carbon to adsorb malodorous compounds. Replacing carbon sorbents with zeolites could increase the efficiency of odor abatement, thus alleviating work-related hazards for individuals exposed to malodorous substances with adverse effects on human well-being. The objective of the present work was to analyze the influence of the textural parameters of zeolite and mesoporous silica materials on the protective and functional properties of polymeric nonwoven composites containing them. In our experiments, the longest breakthrough time against ammonia vapor was found for a nonwoven composite containing the inorganic mesoporous silica material type MCM-41. It was also characterized by high filtration efficiency against aerosols with solid and liquid dispersed phases (97% and 99% for sodium chloride and paraffin oil mist, respectively) at an airflow resistance of approximately 330 Pa. In turn, the composites containing the molecular sieve (SM-zeolite ZSM-5) exhibited the longest breakthrough time for acetone and cyclohexane vapors at the maximum allowable concentrations of 235 ppm and 81 ppm, respectively. Basic filtration tests showed that the composite was 97% effective against both test aerosols at an airflow resistance of 283.5 Pa.

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“…The previous studies indicate that the mixes produced in the foamed asphalt technology by the addition of zeolites are characterized by the fatigue resistance comparable to hot mixes and a slightly lower stiffness modulus [20,21]. Some studies also indicate the reduced water and frost resistance [22][23][24], especially when using the zeolites soaked with water, which improves the foaming effect of asphalt [25,26]. Resistance to water is improved in the case of WMA with zeolite by the addition of hydrated lime [27,28], which is a commonly used antistripping mineral additive in asphalt pavements.…”

Section: Introductionmentioning

confidence: 99%

Application of Zeolite Tuffs as Mineral Filler in Warm Mix Asphalt

2019

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Zeolite materials are used in the warm mix asphalt technology as an asphalt foaming additive, which partially replaces the filler. This article analyzes the influence of the zeolite and other fillers addition on the properties of mastic asphalt. In the research, 35/50 penetration grade asphalt and three types of fillers were used: lime filler (L), zeolite tuff (clinoptilolite) (C), hydrated lime (H) and their mixed combinations (C:L in 1:1 and 1:3 proportions as well as C:L:H in 2:2:1 ratio). The characteristics of the materials included: chemical analysis, phase composition and particle size distribution. The following properties were determined on the asphalt mastic samples: penetration, softening point, penetration index, dynamic viscosity and stiffening measured by softening point increase. It was found that clinoptilolite could partially replace the traditional lime filler, without a negative impact on the asphalt mastic properties. Additionally, the hydrated lime inclusion should have a positive effect on the frost resistance of an asphalt mix.

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Mesoporous silica material MCM-41: Novel additive for warm mix asphalts

Cited by 38 publications

References 26 publications

Application of Fly Ash Derived Zeolites in Warm-Mix Asphalt Technology

Application of Fly Ash Derived Zeolites in Warm-Mix Asphalt Technology

The Effects of Textural Parameters of Zeolite and Silica Materials on the Protective and Functional Properties of Polymeric Nonwoven Composites

Application of Zeolite Tuffs as Mineral Filler in Warm Mix Asphalt

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